Export Agency Lays Bare GOP Split

WASHINGTON—House Republicans are splintering over whether to reauthorize the Export-Import Bank, testing the united front the party was seeking to maintain in a midterm election year.

GOP lawmakers put forth competing proposals for how to deal with the agency, which supports loans to overseas companies to help them buy U.S. exports, while Democrats stepped up a coordinated push to keep the bank running beyond the Sept. 30 expiration...